B. when economic profits are zero

ECON MICRO
5th Edition
ISBN:9781337000536
Author:William A. McEachern
Publisher:William A. McEachern
Chapter8: Perfect Competition
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56) In a perfectly competitive market, when will the process of entry and exit end for firms in the market?

  •  A. when marginal revenue is equal to average variable cost
  •  B. when economic profits are zero
  •  C. when price is equal to average variable cost
  •  D. when marginal revenue equals zero

55) Which of the following measures of cost is best described as “the increase in total cost that arises from an extra unit of production”?

  •  A. average total cost
  •  B. variable cost
  •  C. average variable cost
  •  D. marginal cost
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